Etherpad is a highly customizable open source online editor providing collaborative editing in really real-time.

Collection of handy online tools for developers, with great UX. IT Tools is a free and open-source collection of handy online tools for developers & people working in IT.

Numéricoop a créé un écosystème pour collaborer en ligne grâce à l’agrégation intelligente d’outils issus du logiciel libre. Son nom : Numéricloud

Protect your photos and videos with Ente - a secure, cross-platform, open source, encrypted photo storage app. Automatic backups, end-to-end encryption, collaborative albums, family plans, free trial, library-sync, 1-click import, human support, locked photos, live photos, descriptions, private sharing, search and more.